[Docs] Remove unnecessary lib pckages from install

docs/admin/02_install.rst

@@ -46,9 +46,7 @@ Install some packages from the Debian package system.
                nginx-full \
                python3 \
                python3-dev \
-               libldap2-dev \
                libpq-dev \
-               libsasl2-dev \
                yarnpkg \
                python3-virtualenv \
                chromium \